- 责任者：Zhi Rongjun (College of Earth Sciences and Land Resources ; Chang’an University ; Xi’an 710054 ; China) ; Fan Shuanghu
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(4)
- 关键词：蛇绿岩 ; ophiolite ; 天山 ; Tianshan Mountains
- 页码：p.33-41
- 图表：6 illus., 1 table, 42 refs.
- 分类号：0801
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
There exposed part of the Ophiolitic Melange in Baitutang, the norht of the South Tianshan in Xinjiang. To understand the ultrabasic rocks forming environment, this paper focuses on the 9 samples of this area are tested by the study of geochemical method. Research and analysis of the geochemical results that the serpentinite in the area with low SiO2, TiO2, CaO, K2 O, Na2O, MgO, Al2O3 for the characteristics, with high concentration of compatible elements Cr, Co, and Ni, depleted in incompatible elements, and large ion lithophile element content is low, the overall features similar to the Ocean lherzolite, features representing the man- tleresidue. The basalts possess high TiO2 and MgO contents, not only low Al2O3 and K2O, but also Na1O〉K2O. Compared with MORB, the elements of Nb, Ta apparent are loss. Compared with the primitive mantle, with slow features sdmilar to the N-MORBrs losses, The geochemical characteristics of the main elements and trace elements show that rock should be formed in the tectonic environment similar to mid-ocean ridge, and the magma derived from depleted mantle zone.